Improvement in clasps for belting



GEORGE FREDERICK WHITE, OF HORNSEY, COUNTY OF MIDDLESEX, AND

HARVEY GHAMRERLAIN,

OF LONDON, ENGLAND.

IMPROVEMENT IN CLASPS FOR BELTING, 84.6.

Specification forming part of Letters Patent No. 59,332, dated October 30, 1666.

To all whom it may concern:

Be it known that we, GEORGE FREDERICK WHITE, of Hornsey, in the county of Middlesex, and HARVEY GHAMBERLAIN, of Falcon plate being mounted on a central pin, on which it rotates. This pin may either be on one end of the parts to be drawn closer to or thrust asunder, or itmay be on an independent piece, and the grooved disk arranged to operate on and intermediate of the two parts to be drawn together or thrust asunder, for elongating or contracting purposes. The volute groove receives a pin of the part to be, contracted or drawn closer by the disk. By rotating this disk in one direction or the other the required expansion or contraction will be effected. By employing two volute grooves in the disk, whose axis is mounted on a piece intermediate of the two parts it is desired to separate, elongate, or contract, the extent and rate of motion will be multiplied twofold.

Figures l and 2 of the accompanying plate of drawings represent our invention applied as a book-clasp, Fig. 1 showing a falce view of the clasp andthe opening-edge of the book, While Fig. 2 represents an end view of the same.

The small figures represent the several parts of the clasp detached, all indicated by the let ters of reference. a b are the parts of the clasp afxed to the book-covers, which are the same as in ordinary clasps. The part bis hinged to plate c, while on plate cis superposed the disk d, having the volute groove or slot e. The

v plate f is placed under the part c, andthe three parts, c, d, and f, are secured to each other by socket-pins g and It, and have female screws, corresponding respectively with the screwed pins with heads g h. The pin g forms the axis on which the disk d rotates, and is inserted from underneath the plate f, passing through slot t', through hole 7c in plate c, and through the hole l in disk d, and is scoured in place by the screw-pin g, screwed in from above. of pin g is square, to lit the slot i, and rounded for the remainder of its length, to iit the holes k and Z. y

In like manner pin It is passed from underneath, first through plate f, then plate c, and through disk d, but passing through the groove e therein. The square neck of this pin` h is longer than that of g, as seen. It is inserted through the square hole m in f, and through the slot p, in which it traverses in c, while the round part occupies the thickness of the disk el in the volute e. It is fixed in position by the screwed pin h. By this combination the parts c, d, and f are iirmly secured to each other, while t-he parts c and f may Vslide one on the other to an extent nearly equal to the length of the vslots i' and p, and the combined plates c and f be lengthened or shortened to that extent. This lengthening or shortening is readily effected by rotating the disk d ou its axis. The slot e taking effect on the pin hV causes it to traverse inthe slot p, while the pin g is also free to traverse in slot i. Instead of the pins g h g h', as described, simple rivets may be used. The part f of the clasp has a hole, q, which is passed over the. knob r on part a, to clasp the book in the usual manner, or this connecting part may be a hook or oth. erwise arranged.

By the application of the parts according to our invention to book-clasps they can be made tighter or looser, as may be desired, or, after clasping, may be tightened up,or slackened before unclasping.

A similar application of this invention may be made to glove-fastenings for the purpose of lengthening or shortening thevconnection or fastening. The parts will, of course, be

very much smaller and less expensively put together and will be provided with a hook or button for eecting the attachment of the one part of the glove to the other, the elongating parts, according to this invention, being sim ply introduced for varyin g the length of such It will be observed that the neck y connection. It is equally applicable to waistbelts, tabs and waist-fastenings of waistcoats and trowsers, as also surgical bandages and other like purposes, and more especially to driving-belts, which we have illustrated in Figs.

4 3, 4:, 5, 6, 7, vand' of the drawings, and, like this example, the others herein above enumerated may be made double-acting, instead of single, as in the former illustration-thatis to say, with two volute grooves instead of one, and operating simultaneously.

Fig. 3 represents aface View of the drivingbelt connection; Fig. 4, an edge view ot' the same, while Figs. 5, 6, 7, and 8 represent all the parts detached except the disk, which is sufficiently indicated in Figs 3 and 4. l s t are the ends of the belt or strap to be united. These are riveted to two pieces of metal, s' t', which are hinged to two pieces, u a, of metal, dovetailed and sliding in the body-piece w, seen separately in plan at Fig. `5, longitudinal section at Fig. 6, and in end view at-Fig. 7. In the body w a pin, fr, is fixed, on which the disk y is placed and rotates as a center.

The parts w and u are furnished with pins ij, which are received in the double volute or snail grooves or slot-s o o ot' disk fw. The pins 7' j and .fr are furnished with screws and nuts, as seen, to keep the several parts iu place. We mill or roughen the periphery of the disk y to afford gripe to turn it.

It will be obvious that by turning the disk in one direction the .parts a and fu will be caused to separate from each other by the traverse of the pins jj in the volute grooves, and that by turning it in the opposite direction these pieces a and o will be constrained to approach each other, and so cause the endless band or driving-strap in which such is interposed to be lengthened or shortened, and so tightened or loosened as may be required.

A third illustration represents in Fig. 9 a plan; and Fig. 10, `an edge View, shows the invention applied to lengthening or shortening bars, connecting rods, and other like purposes.

A A is a dovetailed bed or liunction piece, into which are fitted to slide the two ends of the parts to be connected, B B. The crosssection of A would be the same as represented at'Fig. 7. On parts A and B is superposed the disk G, mounted on the central stud-pin D, on which it is to be rotated. Like the last arrangement, this has two volute grooves, receiving pins E E, fixed in parts B B. By rotating the disk C the parts B B will be caused to approach or recede from each other,

,and thereby lengthen or shorten the extent ot' the two parts B B, las may be desired.

The metal disk C, like the last described, is milled on the edge, to afford the necessary gripe; or it may be six, eight, or more sided, and a spanner applied for the purpose of turning it. Greater or less pressure may be exerted on the disk by the nuts of pins D andE E, either to fix it in position when it has been adjusted, or to generate the necessary friction to prevent its rotation when not required.

In all cases the friction or other obstruction to the rotation of the disk should be such that the force or tension a-pplied to the rod, belt, or other article to which this apparatus is applied shall not be overcome and so as to cause the rotation of the disk.

What we claim as `our invention, and desire to secure by Letters Patent of the United States of America, is

The apparatus, constructed and. operating substantially as herein described, and represented in the drawings, when applied to the elongation and contraction of articles, in the manner and substantially as specified.

GEO. F. WHITE. H. CHAMBERLAIN.

Witnesses:

GHAs. J. ANDERSON, JOHN E. BRUNSWICK. 

